For those of you who may not already be aware, on the 29th August Microsoft announced the increase to the Primary Mailbox Size for Exchange Online / Office 365 Exchange Online Customers. This comes weeks after the recent increase to SkyDrive Pro Storage allocation.

The size of user mailboxes in all Exchange Online and Office 365 service plans is doubling. Beginning today, the current 25 GB of mailbox storage is increasing to 50 GB.